Workaround for Allwinner A64 erratum UNKNOWN1

configname: CONFIG_SUN50I_ERRATUM_UNKNOWN1

Linux Kernel Configuration
└─>Device Drivers
└─>Clock Source drivers
└─>Workaround for Allwinner A64 erratum UNKNOWN1
In linux kernel since version 4.2 (release Date: 2015-08-30)  
This option enables a workaround for instability in the timer on
the Allwinner A64 SoC. The workaround will only be active if the
allwinner,erratum-unknown1 property is found in the timer node.